Project options are defined for a configuration so you can have different
values for a project option for different builds. A given configuration can inherit
the project options of other configurations. When the project system requires a project option
value, it checks for the existence of the project option value in the current configuration
and then in the set of inherited configurations. You can specify the set of inherited configurations
using the Configurations dialog.

A special configuration named Common is always inherited
by a configuration. The Common configuration allows you to set project options
that will apply to all configurations you create. If you are modifying a project option of your project, you
almost certainly want each configuration to inherit it,
so ensure that the Common configuration is selected.

If the project option is unique, the build system will use the one defined for
the particular configuration. If the project option isn't defined for this configuration,
the build system uses an arbitrary one from the set of inherited configurations.

If the option is still undefined, the build system uses the value for
the Common configuration. If it is still undefined, the build system tries
to find the value in the next higher level of the project hierarchy.